General Car Classing Info

Car Classing Information

Need some help deciding in which class your car belongs? The SCCA Solo Rules Handbook describes each class as well as the modifications that are allowed for your class. The SCCA may have updates within the year to clarify what mods are allowed. Many other rules for the sport are also covered. Try this Link:

Class overview

Street

Street category vehicles are any that have been in series production within the US in the last 30 years and asides from what is allowed in the rules must be factory stock. This is a good starting place if your car is factory stock.

Typical mods may include:

One aftermarketsway bar (Front or rear)

200tw tires

Aftermarket wheels the same width, within 1 inch diameter and within 7mm offset as factory

Street Modified

Street Modified allows for some of the more extremely modified cars with allowances for engine modifications. These will be some of the most modified cars you'll see that are still able to be street driven.

Typical mods may include:

Anything that is allowed in Street, Street Touring and Street Prepared

Modified

Solo Spec Coupe

Solo Spec Coupe is a spec class for all 2013-2016 FR-S/BRZ cars. This class was created to provide a middle ground between the Street and Street Touring category. Modifications are limited to specified parts to keep costs down and provide a level playing ground.

Classic American Muscle

The Classic American Muscle category is designed for any North American front engined, rear wheel drive car. The ruleset is fairly open to encourage muscle car and pro-touring enthusiasts to participate in autocross.